a bitcoin "
enthusiast" that is easily triggered by the mention (or mere existence) of any
alternative crypto coins, because they see these as
competition and a threat to bitcoin. They are unwilling to accept the fact that other coins can exist, and perceive their existence as an insult because bitcoin was the first (and what they consider the only) cryptocurrency and that all others are copycats, "scams" or
otherwise "shit". They claim bitcoin was the best financial instrument invented in the last 1000 years, while also claiming that nothing better could ever possibly come along in the future.
They are called "boomers" not because of their age, but instead because of their holier-than-thou attitude towards others, and their belief that they've been part of the crypto currency scene long enough to declare themselves an authority on all things finance (even if a latecomer to bitcoin). They are also sometimes referred to as a Bitcoin Maximalist and/or Bitcoin Cultist.